Railway car side door lock



K. F. NYSTROM RAILWAY CAR SIDE DOOR LOCK 2 Sheets-Sheet l qri inal Filed April 21, 1941 lUF L Sept; 12, 1944. K. F. NYSTROM RAILWAY GAR SIDE DOOR LOCK Original Filed April 21, 1941 2 Sheets-Sheet 2 [02! 1? Af air-0272 proved lock.

Patented Sept. 12, 1944 Karl F. Nystrom,

Standard Railway C mp re],

Original application 389,487, now Patent Divided and this application ary-25, 1944. December 20, 1941,

way cars and more particularly to railway cars having a great inside width while falling within the maximum outside width defined by the clearance lines which are specified by th fAssociation of American Railroads. Railway cars commonly have doorways in the side walls thereof and doors for closing such doorways are commonly movable in planes substantially parallel with the side walls of the car. The necessary characteristics of such doors are that they be strong enough to resist thrusts from the inside of the car caused by the shifting of the lading and that they form reasonably tight seals with the frame members around the doorways to prevent the entrance of moisture, cindersand other foreign matter into the interior of the car.

An object of the invention is to provide a lock which permits the door to be'moved freely to full closed position without any necessity for manipulating the locking mechanism during such closing movement. The door is not automatically locked by the closing movement thereof but is in position to be securely locked by a subsequent simple operation. 7

Another object of the invention is to provide a door lock which does not interfere with sealing strips on the edges of the door and doorway frame, which method of accomplishing such means will be hereinafter pointed out in detail.

Other objects and advantages of my invention Will be apparent from the following detailed de- Milwaukee, Wis., assignor to Equipment Manufacturing a corporation of Delaware April. 21, 1941, Serial No,

2,340,014, dated Janu- Serial No. 423,709 2 Claims. .(Cl.292--63) This invention relates to side door for railscription by referring to the accompanying draw-.

ings.

In the drawings: Fig. 1 is a side elevation of a portion of a railway car showing a side door embodying my im- Fig. 2 is an enlarged view of the lock mechanism shown in Figure 1, the door being fully closed and locked.

Fig. 3 is a view of the lock mechanism shown in Fig. 2 when the door is in full closed position but not locked.

Fig. 4 is a section on line 44 of Figure 2.

Figure 1 discloses a portion of a railway car having the usual side plate 2, side sill 3 and vertical posts, such as the door posts 5, 6, extending between and secured to the plate 2 and sill 3. The present invention is particularly related to the door and doorway structure of the car; the other parts of the side wall may be of any convenient design such as, for example, that shown in my Patent No. 2,150,897 dated March 21, 1939.

The door 8 has front l0 and rear ll roller 'revc-lubly mounted within the housings.

coped so that the tread secured thereto with rollers l3 The door track I4 is a channel member having its-web secured to the'outer side of the web l6 ,of the channel shaped sill 3 and with itslower flange l'l supporting the tread which is an angle l9 upon which the rollers l3 roll during horizontal movement of the door 8. The lower flange I1 is angle I!) may be depressed (29) at certain places below the general level of the tread. The depressions 20 in the tread!!! are arranged so that when the door 8 is in the full opened or full closed position, the rollers l3 are above the depressions 20 and the weight of the door is taken by the bottom frame strip of the door engaging a projection on the track, thereby frictionally resisting movement of the housings rigidly door. The rollers [3 are then out of engagement. with the tread l9 and may be rotated freely.

sistance and move the door 8 into such position that the rollers are operative, a starting lever 24' is pivotally mounted upon the door 8, which lever 24 has a projection 25 on the lower end thereof arranged to engage a starting bracket 21 secured to the side sill 3 so that a leverage may be exerted to pry the door 8 into rolling position. Theoperation of the starting lever 24 is more fully explained in Schlesinger Patent No. 1,963,152 dated June 19, 1934;

The locking ,mechanism comprised of a bracket 3| erably by means of rivets 33,

30 for the door 8 is rigidly mounted, prefupon the side sill 3 of the car and arranged to extend upwardly and I upper part of the pair of spaced apart lugs 34, 36 having aligned holes therethrough and a rigid pin 31 is inserted through both holes and held in place by a cotter key 39. A latch member outwardly therefrom. The bracket 3| carries a 49 has a vertically extending slot-42 therethrough and the pin 31 projects through the slot so that the latch member an extent limited by the length of the slot 42. The latch member 40 is also free to rotate upon the pin 31 as a fulcrum, which rotation is limited by the parts 43, 45 of the bracket 3|.

. The front roller housing It] has a nose 4! which protrudes beyond the front edge 48 of the door 8 and has a vertically extending hole 50 therethrough or upwardly facing recess therein. When the door 8 is in the full closed and locked 40 is slidable vertically to' 7' The latch member condition.

' is inserted in the hole [of the roller housing seal'may be inserted ,7 position, as shown in Figure 2, the lower end of the latch member 40 is disposed in the hole 50 in the roller housing nose 4! and thereby prevents horizontal movement of the door 8.

40 is provided with an outwardly projecting lug53and a-dog 541s pivotally mounted upon the pin 31 and also provided with an outwardly projecting lug 56'aligned with the lug 53 when thelock is in the locked position,

as shown in Figure 2. The lug 56 has a hole51 arranged to align' with the hol 59 in the latch member lug 53 when the lock is in the position shown in Figure prevented from moving vertically and the door a is, therefore;locked in the run closed position.

' A seal may be inserted through both the holes 51,

59 so that any unauthorized opening of the door 8 may be detected byrailroadoiiicials, or others responsible for maintaining the car in the sealed When the door 8 is in. an opened position, both the latch member 40 and the dog 54 hang by their own weight in depending positions. When door 8 is moved to the full closed position as shown in Figure 3, the latch member 40 rotates about the pin131 to the position shown. In order to lock the door 8, it is necessary to rotate the dog 54 until the lug 56 thereof is moved out of the path of the-lu 53' on the latch member 40; then the latch member 40.may be moved upwardly and then downwardly until the lower end 5| thereof Ill: The dog 54 i then roshown in Figure 2 and the through the holes 51, 59 for the purpose of sealing the door. In order to open the door, the above formed in reverse;

The accompanying drawings illustrate the preferred form of the invention, though it is to be understoodthat the invention is not limited to tated to the position the exact details-of construction shown and described,-as it is obvious that various modificadescribed operation is per-,

2,358, 025 I a V tions thereof, within the scope of the claims, will 2, The latch member 40 is thus 2,340,014, dated January 25, 1944.

occur to persons skilled in the art.

This is a division of my application filed April 21, 1941, Serial No. 389,487, now Patent No.

7 I claim:

, l. Ina railway car having aside wall, a door Z way in said side wall and a door movable in a plane parallel with doorway, the combination of a bracket secured to said wall, a latch mounted upon said bracket and arranged for limited vertically slidableand rotating movement in a plane substantially par allel with said wall, a lug on said latch; a member to said door having a lateral prosaid doorway extendable in the fixedly secured trusion below path of said latchwhen in its lowermost position, said protrusion having a vertically extending aperture' aligned with said latch when in its through the nose 41 t lowermost position and'when the door'is closed, and'a dog unrestrictedly pivotally mounted on,

and arranged tobe moved into align-- prevent 'upwardly sliding able with said lugto prevent vertical movement position of the latch, said dog being pivotally swingable -out of, to permit verticalmove of the latchduring any pivotal engagement with the lug ment of th latch, and a member mounted upon said door having a.hole, therein, said hole being in alignment with said latch when therdoor is in substantially closed position so that V be locked by passing said latch through said hole.

a V V KARL F. NYSTROM. 1

said wall ,for closing said,

secured to said wall, a latch, latch upon said bracket for o the door may 

